Vibrator roller for printing presses



Feb. 6, 1940. .1. LEVINE VIBRATOR ROLLER FOR PRINTING PRESSES Filed April 27, 1938 INVENTOR Patented Feb. 6, 1940 VIBRATOR ROLLER \FOR PRINTING PRESSES Jesse Levine, New York, N.;Y. I Application April 27, 1938, Serial No. 204,513

3 Claims.

This invention relates to vibrator rollers for printing presses; and particularly to those adapted for use in color printing. The object of the invention is to provide a sectional roller, preferably of all-metal construction, and composed of a plurality of sections adjustable. relatively to one another, whereby printing in several colors can be simultaneously and effectively performed. A further object of the invention is to provide means by which the various roller sections can be easily and conveniently set at any desired position relative toone another, and also means by which the entire roller can be removed as a unit from its operative position in' the press.

Another object of the invention is to provide means by which the improved roller will be vibrated independently of the other rollers in the and Fig. 4 is a sectional view on the line 4-4 of Fig. 2, looking in the direction of the arrows.

In the diagrammatic view of Fig. 1, Various rollers ordinarily employed in a printing press of conventional type is shown. There, the usual ink fountain is indicated at 5, the same having the conventional partitions 6 for dividing the fountain into the chambers containing the various colored inks. The fountain is provided with the conventional doctor-blade 1, adjustable toward the distributing roller 8, which delivers a coat of ink to the roller 9, thattransfers the same to the cylinder Ill. Roller ll, usually of a composition material, distributes ink to the improved vibrator roller [2 from which ink is received by the rollers l3 and I4 and applied to the face of the plate l5 which makes :the impression upon the paper carried over the cylinder l 6. The illustration thus far given, applies to a wellknown type of press, the construction of which, aside from roller l2 and associated parts, forms no part of the present invention.

The invention relates more particularly to the vibrator roller indicated at I2 and shown in detail in Figs. 2, 3 and 4. v The same includes the central shaft I! which is provided with the body portion IS. The shaft [1 is rotatably driven through gear 40 which meshes with gearing internal threads of bushing 24.

driven from a source of power in the usual way. Shaft I1 is mounted at its opposite end in the bearings l9 and 20, the bearing indicated at being a removable one secured in positionin the arm 2| by means of the screw 22. The end portion of shaft I1 is formed with a thread23' which turns Within an internally-threaded bush-" ing 24 held in member 25 by means of a plate spring 26 (Fig. 4), secured by the screws '21; inmember 25and extending, across a portion of the periphery oi the bushing 24 and resiliently resisting rotative movement of bushing 24 within member 25.- A collar 28 is secured by screw'29 to bearing 20 and a screw 3fi holds the member 25' in place within the collar 28. a

The mechanism. described serves to impart a longitudinal reciprocating movement to the roller [2 during its rotative movements, this longitudinal movement being attained by means of the thread 23 rotating within the complementary Stops 31 and 32 on the shaft H limit the longitudinal movement of the shaft H in the bushing 24, the spring ZB/permitting a slight resilient rotative movement of bushing 24 in its support 25 when the stop 32 contacts against stop portion 33 formed at the end of the bushing 24 A similar stop portion 34 is provided at the opposite end. of bushing 24 for contact with stop 3| on shaft I! at the, proper time in the rotative movement of shaft I1.

Mounted for'adjustment on the portion ill of shaft 11 is a plurality of roller sections 35, said roller sections being adapted to be slid lengthwise on the portion l8 and fixedly yet removably positioned at any selected points thereon in any selected spaced relationship with respect to one another. The various roller sections 35 are of similar diameter and each section 35 is of sleeve-like formation and has a reduced cylindrical portion 36 at one end and an annular recess 31 at the opposite end. Thus, a reduced portion 36 on oneof the members 35 will fit within the annular opening 31 of another section 35 whenever desired, so that should an occasion require it, the entire roller' can be made up of a plurality of these sections 35 to form a roller surface of continuous, uniform diameter. The sections may be of various lengths, such as shown in Fig. 2, according to the area over which the ink is to be distributed by each section and they may be placed in any selected spaced relationship according to the areas of desired application of the differently colored inks.

The portion l8 of the roller shaft is formed with a continuous longitudinally extending groove 38 intended to receive a set screw 39 threaded in and extending through, the reduced portion 36 of each of the roller sections 35. Thus, to provide a roller made up of a plurality of these sections 35, it is merely necessary to loosen the respective set screws 39 and slide the roller sections 35 along on the portion 18 and. when the proper points of location have been reached, the set-screws are tightened to firmly fix the roller sections 35 on the portion I8. Since the setscrews 39 will enter the groove 38, the roller sections 35 secured on the portion I8 will be held in non-rotative position relative to portion 18. Since the portions 36 telescope within the recesses 37, two or more of the sections 35 may be placed together in abutment to make one long section. That is to say, the reduced portion 35 of onesection 35 will enter the annular recess 31 in the next section and the eifect of a single roller sec- 7 tion can be thus produced.

' The roller sections 35 are preferably made of steel or other suitable metal and thus will last indefinitely in the normal use of the press. At the same time, the entire roller asembly may be readily taken out of the press by removal" of the bearing 20 and the shaft and assembled parts.

Through the arrangement disclosed, a very I flexible means is provided for greatly facilitating color printing, since the movable roller sections 35 may be located in any desired position on the device the removableroller sections are placed on the shaft only in positions corresponding to portions of the printing plate to be printed, and other parts of the shaft are left vacant, thus considerably reducing the weight of the complete roller in operation and relieving strain and wear on the bearings. Theseand other objects are accomplished by-the invention, which is not to be limited to the exact embodiment shown, but is broad enough to cover all structures coming Within the scope of the annexed claims.

What I claim is: I

1. A sectional roller for color printing comprising, a shaft, means for mounting said shaft for rotative movement, said mounting means in- :1 eluding a threaded portion on the shaft, a threaded bushing in which the threaded portion of the shaft is mounted, a cylindrical holder within which the bushing is concentrically held and by which the bushing is enclosed, a bracket in which said holder is mounted, said holderhaving a Wall portion cut away, and a fiat spring disposed in the cut-awayportion of the wall of the holder and having its ends fixedly attached to said holder and its interme-diate'portion resiliently bearing against the periphery of the bushing to resilient 1y resist rotative movement of the same Within the holder. V

2. A- sectionalroller for-color printing comprising, a shaft, means for mounting the shaft for rotative movement, said means including a threaded portion at one end of the .shaft, a

threaded bushing within which the threaded end portion of the shaft is rotatable, a cylindrical holder for said bushing within which the bush- Y ing is concentrically enclosed, said holder having 1 m a cut-away portion in its annular wall to expose a portion of the bushing, a fiat spring disposed acros the cut-away portion of the holder and in peripheral contact with the bushing, w means for fixedly securing thejopposite ends in its holder and permitting slight rotative movement under resilientresis't'ance when the stops are reached during longitudinal movement of the shaft. I y

3. In a sectional roller structure for color printing, a roller means for mounting said roller for longitudinal vibratory movement comprising a supporting bracket through which the shaft extends, m-eans for detachably securing said bracket to the press frame, said bracket having a 0y a sleeve secured in and projecting out of the col- 1 lar, said sleeve having a slotted annular wall,

and a flat spring having its ends secured to the annular wall at the ends of the slot therein, said spring overlying and resiliently resisting rotative movement of the bushing within the sleeve.

JESSE LEVINE. I 

